they are both equally famous, but adele is probably slightly more famous the David Guetta after she sung the the song 'skyfall' in the James Bond movie of the same name.
Shrek
spongebob
Garfield I think.
Sonic the hedge hog
It must be Lady Gaga. I had heard of Lady Gaga even before she was in a Simpson's episode. This is the first time I've ever heard of David Guetta.
Adele is more famous
Definitely Winnie the Pooh. He's been around for longer! ~Chris
adele is more famous and has won more awards
Adele
Adele.
adele is more famous than neil diamond
Isaac Newton is more famous than Adele. However, Adele sings better.